in our application we have some kind of online help. It works really simple: If the user clicks on the help button a URL is build depending on the current language and help context (e.g. "http://example.com/help/" + [LANG_ID] + "[HELP_CONTEXT]) and called within the browser.
So my question is: How can i check if a file exists on the web server without loading the complete file content?
Thanks for your Help!
Update: Thanks for your help. My question has been answered.
Now we have proxy authentication problems an cannot send the HTTP request ;)
You can use .NET to do a HEAD request and then look at the status of the response.
Your code would look something like this (adapted from The Lowly HTTP HEAD Request):
// create the request HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; // instruct the server to return headers only request.Method = "HEAD"; // make the connection HttpWebResponse response = request.GetResponse() as HttpWebResponse; // get the status code HttpStatusCode status = response.StatusCode;
Here's a list detailing the status codes that can be returned by the StatusCode enumerator.